Paul oudin and henri othon kratz-boussac



(No Model.)

-' P. OUDIN. &- H. O. KRATZ-BOUSSAOL ELEUTRO MEDICAL LIGHTING APPARATUS.N0. 455,972.

[Patented July 14,1891.-

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' UN TED STATES IPA-TENT O FICE.

PAUL OUDIN AND HENRI OTHON KRATZ-BOUSSAO, OF PARIS, FRANCE.

ELECTRO-M EDICAL LlG HTI NG APPARATU S.

SPECIFICATION forming part of Letters Patent No. 455,972, dated July 14,1891. Application filed October 18,1890. Serial No. 367.888. (No model.)

To all whom it may concern.-

Be it known that we, PAUL OUDIN and HENRI OTHON KRATZ-BOUSSAC, residentsof the city of Paris, in the Republic of France,

have invented certain new and useful Improvements in Electro-lledicalLighting Apparatus, of which we declare the following to be a full,clear, and exact description.

The apparatus for which we solicit Letters Patent is designed to furnishphysicians and surgeons a source of light by which to examine thedifferent natural cavities of the human body. It is composed of twoessentially distinct parts: first, a box containing a certain number ofpiles already patented-Gassners elements-forming the electromotor whichsupplies the current for the incandescent lamps. This first part of theapparatus will always remain the same, with the reservation,nevertheless, of improvements which may be made later on the compositionof these elements. Such as they are to-day,we employ abattery made up offrom four to ten elements, forming together a single series or twoseries, which can, according to requirements, be used together oralternately. The lighting apparatus proper will vary according to itsparticular application, but embodies always an incandescent lamp whosecontacts will be so disposed that the circuit will be closed when theapparatus is in working position, and on the contrary it (the circuit)will be broken automatically and the illumination will cease when theexamination is terminatedor the device is in other than an operativeposition. To obtain this result we have so arranged the differentmembers of our apparatus that the contacts are normally held apart by aspring, the pressure of which is overcome in the act of using theapparatus. At the head of these instruments we will'place afinger-sheath intended to be worn on the thumb or any other finger ofthe operator, hindering in no wise the movements of the hand or finger,and serving as a support to an incandescent lamp which will light up thedifierent organs to which the hand is brought in proximity or thecavities in which the apparatus is inserted.

In the accompanying drawings, forming part of this specification, Figure1 represents in side elevation our apparatus in position on operatorsthumb, the contacts being separated. Fig. 2 is a plan view showing thethumb straightened and the contacts touching to complete the circuit andput the lamp in operation.

The finger-holder is composed of two concave metal plates A and B,shaped to fit the back of the finger, on which they are held by twobands of rubber K K. These two plates are connected by a hinge O, whichwill be placed opposite the first joint of the finger. A spring R,secured at one end on the convex side of one of the plates, or a coiledspring on the hinge-pintle,will continually maintain a demi-tlexion,unless the operator straightening his finger overcomes the action of thespring. Different mechanical means can be employed to determine theclosing of the electrical circuit.

In Figs. 1 and 2 the two metal plates united by a hinge form one of theconductors for the lamp, which is secured by a knee-joint to the freeend of the outer plate B. The two halves of the knee-joint, each ofwhich connects with one of the poles of the lamp, are insulated by astrip of ebonite c. The circuit is established through two metal stems mand n, mounted in insulating fittings, which serve to secure them toplates A and ,When'the apparatus is straightened out, these two ste ms mand n are brought together, causing their contactpoints a and b to meetabove hinge C and so close the circuit, while as soon as the apparatusis left to itself the spring R, the pressing-point of which on the outerplate is insulated, will open the circuit and in consequence extinguishthe lamp. v

In-Fig. 2 the outer end of the holder is supposed to be broken away tomore clearly illustrate the construction.

Following the same principle we could apply incandescent lamps to allsorts of speculums, &c., and with such arrangements as would beeasilyimagined, according to the nature of each apparatus.

What -we claim is 1. The combination of an incandescent electric lamp, asection or support therefor mounted upon the extremity of the finger byrubber band K, a second section secured upon another joint of the fingerby a similar band,

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and contacts at the adjacent ends of said secflexing or reflexing thefinger, substantially tions,wherebythe circuitis completed through asset forth. the lamp by flexing or reflexing the finger, In testimonywhereof we have signed this substantially as set forth. specification inthe presence of two subscrib- I5 5 2. The combination of an incandescentelecing witnesses.

tric lamp a section or supporttheretor adapt- PAUL OUDiN ed to bemounted upon the extremity of the HENRI OTHON KRATLBOUSSAC.

fingena second section adapted to be secured I upon another joint of thefinger, and contacts Witnesses:

10 at the adjacent ends of said sections,whereby R. .T. PRESTON,

the circuit is completed through the lamp by JOSEPH COURNIO.

